Battle of Chausa was fought near Buxar. Humayun was badly defeated and Sher Khan adopted the title of Sher Shah. Humayun barely escaped with his life from the battle field.
The Vijaynagar and the Brahmini kingdoms are always at war for various reasons. The delta region between Krishna and Tungabhadra along with Krishna Godavari delta is a major issue. It is a Marathawada country.